Add all kernels from test build workflow to download.sh

- Added older specific patch level kernels alongside existing LTS kernels
- Now includes all 13 kernel combinations from test-build.yml matrix
- Updated comments to reflect comprehensive kernel coverage

download.sh

@@ -0,0 +1,111 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Quick script to download ALL kernel sources used in test builds and name them properly.
+# Folder name format: "<kernel_version>.<sublevel>-<android_version>-lts"
+# Usage: ./download.sh [target_root]
+# Example: ./download.sh ./kernel_sources_lts
+
+TARGET_ROOT=${1:-"./kernel_sources_lts"}
+
+# Ensure target root exists
+mkdir -p "$TARGET_ROOT"
+
+# Require the 'repo' tool to be installed and available in PATH
+if ! command -v repo >/dev/null 2>&1; then
+  echo "Error: 'repo' tool is required but not found in PATH." >&2
+  echo "Install instructions: https://source.android.com/docs/setup/build/downloading\n" >&2
+  exit 1
+fi
+
+REPO=$(command -v repo)
+
+# Determine CPU count for parallel sync
+CPU_COUNT() {
+  if command -v nproc >/dev/null 2>&1; then
+    nproc
+  elif command -v sysctl >/dev/null 2>&1; then
+    sysctl -n hw.ncpu
+  else
+    echo 4
+  fi
+}
+
+# Branch format used by AOSP kernel manifest
+# common-${android_version}-${kernel_version}-${os_patch_level}
+
+download_one() {
+  local android_version="$1"   # e.g. android14
+  local kernel_version="$2"    # e.g. 6.1
+  local os_patch_level="$3"    # e.g. lts
+
+  local formatted_branch="${android_version}-${kernel_version}-${os_patch_level}"
+  local work_dir="${TARGET_ROOT}/${kernel_version}.X-${android_version}-${os_patch_level}"
+
+  echo "\n=== Downloading sources for ${kernel_version}.X-${android_version}-${os_patch_level} ==="
+  mkdir -p "$work_dir"
+  pushd "$work_dir" >/dev/null
+
+  # Initialize manifest
+  "$REPO" init --depth=1 \
+    --u https://android.googlesource.com/kernel/manifest \
+    -b "common-${formatted_branch}" \
+    --repo-rev=v2.16
+
+  # Handle deprecated branches (matches build.yml logic)
+  local remote_branch
+  remote_branch=$(git ls-remote https://android.googlesource.com/kernel/common "${formatted_branch}" || true)
+  local default_manifest_path=".repo/manifests/default.xml"
+  if echo "$remote_branch" | grep -q deprecated; then
+    sed -i "s/\"${formatted_branch}\"/\"deprecated\/${formatted_branch}\"/g" "$default_manifest_path"
+  fi
+
+  # Sync
+  "$REPO" --trace sync -c -j"$(CPU_COUNT)" --no-tags --fail-fast
+
+  # Extract sublevel from common/Makefile
+  local sublevel="X"
+  if [ -f "common/Makefile" ]; then
+    sublevel=$(grep '^SUBLEVEL = ' common/Makefile | awk '{print $3}') || true
+    if [ -z "$sublevel" ]; then
+      sublevel="X"
+    fi
+  fi
+
+  popd >/dev/null
+
+  # Final name with actual sublevel
+  local final_dir="${TARGET_ROOT}/${kernel_version}.${sublevel}-${android_version}-${os_patch_level}"
+  if [ "$final_dir" != "$work_dir" ]; then
+    mv "$work_dir" "$final_dir"
+  fi
+  echo "Saved to: $final_dir"
+}
+
+# All kernel combinations from test build workflow
+# Android 12 - 5.10
+download_one "android12" "5.10" "2021-08"  # oldest (sub_level: 43)
+download_one "android12" "5.10" "lts"      # LTS
+
+# Android 13 - 5.10
+download_one "android13" "5.10" "2022-04"  # oldest (sub_level: 107)
+download_one "android13" "5.10" "lts"      # LTS
+
+# Android 13 - 5.15
+download_one "android13" "5.15" "2022-06"  # oldest (sub_level: 41)
+download_one "android13" "5.15" "lts"      # LTS
+
+# Android 14 - 5.15
+download_one "android14" "5.15" "2023-06"  # oldest (sub_level: 110)
+download_one "android14" "5.15" "lts"      # LTS
+
+# Android 14 - 6.1
+download_one "android14" "6.1" "2023-06"   # oldest (sub_level: 25)
+download_one "android14" "6.1" "lts"       # LTS
+download_one "android14" "6.1" "2025-05"   # specific (sub_level: 134)
+
+# Android 15 - 6.6
+download_one "android15" "6.6" "2024-07"   # oldest (sub_level: 30)
+download_one "android15" "6.6" "lts"       # LTS
+
+echo "\nAll kernel sources downloaded to: $TARGET_ROOT"